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Weathering test - wet smear resistance of printed peat culture, substrate and humus packaging
Testing the resistance of printing inks to environmental influences such as moisture, sunlight (UV radiation) and to substances eluted from the filling materials (e.g. humic acids, agricultural chemicals) during outdoor weathering.  For the practical assessment of the wet smear resistance of the printing and the weather resistance of the film materials in the time-lapse test, including the pallet securing film, by means of artificial weathering with xenon arc light in accordance with DIN EN ISO 4892-2.  
test method: Mechanical properties Norms: 
DIN EN ISO 4892-2 (in Anlehnung)  (2013-06) Needed sample size: 2 linear metres of unused packaging film + approx. 2 linear metres of unused pallet-securing film (stretch hood, stretch film, shrink film), approx. 5 litres of fresh original filling good 
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Examinations in this area 
Abrasion test of printings acc. Dr. Ruf method Air permeance (Gurley) Anti-dew (anti-fog) test Bending stiffness Blocking test/blocking strength Bond strength/peel force of laminates/multi-layer films/bondings (temperature range - 40 up to + 120 °C) burst resistance (Mullen) paper Characterisation of stretch hood and stretch wrapping films by hysteresis tensile test (only in stretching direction, e. g. generally in TD) Cling adhesion of stretch wrap films, agricultural stretch films, catering films, cling films and other cling films coefficient of friction COF Compression test on cups, buckets and basins  (temperature range - 40 up to + 120 °C) Creep test Curling or flatness Curvature of films Determination of thickness of plastic films, aluminium foils, plane multilayer-materials and sheets Determination of weight Dimensions and repeating patterns on pouches, bags etc. Drop test of bags and pouches Evaluation of flatness, curvature and wrinkling of plastic films - strip method Fat permeability/fat density Fat-repellent impregnation of paper, lipophobic properties, Kit test FINAT peel adhesion Gelboflextest/Brugger KFT Grammage, yield Impact resistance by free-falling dart method (Dart Drop), staircase method Impact resistance by the free-falling dart method – Instrumented puncture test Indentation hardness (Shore hardness) Light fastness/ Wool (blue) scale - artificial irradiation by filtered xenon arc light Linear dimensional changes/dimensional stability/temperature stability of films and sheets Printing ink adhesion (Tesa test) Printing inks and coatings/ lacquers-  Fastness;Suitability tests, resistance, hot alkali resistance Puncture resistance, quasi-statical (temperature range - 40 up to + 120 °C) Roll length (running meters) Roughness acc. Bendtsen Seal resistance of printings or coatings (heat resitance) Seal seam quality of PE- pouches or sacks  (temperature range -40 to +120 °C) Seal strength, tensile test on strips (temperature range -40 to +120 °C) Sealing and welding properties of films, verification and comparison by laboratory sealing press Sealing seam strength of peelable bags, sacks, sealed packages with package testing device for determining the opening forces Sealing/welding properties of films/hot-tack test of films Shear strength of glued seams (temperature range - 40 to +120° C) Shrinkage of PE films (Betex tester) Shrinkage stress measurement of plastic films Smoothness according to Bekk Sterilisation/pasteurization in laboratory autoclave Storage test in temperature-controlled room under standard atmospheres23°C/ 50 % r.h. storage test/ accelerated aging in explosion protected heating chamber (controlled temperature) Storage test/accelerated ageing in climate chamber (controlled temperature and relative humidity) Storage test/accelerated ageing in lab drying oven or refrigerator (controlled temperature) Surface resistance/resistivity Tear resistance (also folded edges), (temperature range - 40 up to + 120 °C) Tear resistance (Elmendorf) Tensile test aluminium films tensile test films and laminates  (temperature range -40 to +120 °C) Tensile test paper wet strength Tensile test paper, sealing strength of paper samples Tensile-impact strength Unpacking barness of cups (hollow bodies) Volume determination of carrier bags and pouches Water absorption of paper/Cobb test Weathering test - wet smear resistance of printed peat culture, substrate and humus packaging Wetting tension (e. g. for determination of Corona treatment intensity)  
	         
	            	 
		    
    
    
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